Method and apparatus for external heart stabilization

A suitable device for use as an external stabilizer heart base, comprising: an implantable material according biocomptible strip configuration comprising a top edge, a bottom edge and a central portion; wherein: the distance between the outside of the top edge and the outside of the bottom edge is between 2 and 5 cm; or the width of the device is less than or equal to 1 / 2X, where X is the distance between the base and the bottom of the apex of the heart; which it is adapted for external application to the heart base, and which in use: completely encloses the base of the heart; subtends the atrioventricular heart valves; and reduces and / or prevents increases in the dimensions of the base of the heart beyond a predetermined phase in all size of the cardiac cycle.